2006 Lexus gs300 won’t crank

Sam Owner Maryland Posted   Latest  

Any assistance on this would be great l! Customer said he replaced ecu with reman for transmission shifting issue now car won’t crank with either ecu. Company from the reman ecu sent dongle to program the ecu. but that does not se to work. Key seems to be recognized and per my snap on Verdict show the emobilizer set when ign off and under when ign is on. jumped starter relay land can get it to crank 

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Arsalan Owner/Technician
District of Columbia
Arsalan
 

Does it communicate ? Any codes? is the security light on?

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Arsalan Owner/Technician
District of Columbia
Arsalan
 

Back in the days this vehicle also had a issue with Fuel Rail Sensor, see if you can unplug and see if the vehicle cranks? but check for security and communication issue first.

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Sam Owner
Maryland
Sam
 

Communicates, no codes

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Arsalan Owner/Technician
District of Columbia
Arsalan
   

at DLC jump pin TC & CG (13 & 4) with key ON and let vehicle sit for about 1 hour (with battery maintainer) and leave the vehicle key fob inside the vehicle. After that see if the vehicle would start? Make sure to remove jumper pin from DLC before starting.

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Sam Owner
Maryland
Sam
 

So that is what I have done thus far however most all information I have read says 30 mins do you have other info stating hour?

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Jason Owner/Technician
Virginia
Jason
 

30 mins is correct but I always tell people to do 35.

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Sam Owner
Maryland
Sam
 

Well I will give it 40 mins, does anyone have wiring diagram of the ecm connector and or ignition switch

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Arsalan Owner/Technician
District of Columbia
Arsalan
 

This is a diagram for the Starting Circuit

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Arsalan Owner/Technician
District of Columbia
Arsalan
 

ECM

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Sam Owner
Maryland
Sam
 

Does communicate but no codes

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Arsalan Owner/Technician
District of Columbia
Arsalan
 

Try disconnecting the battery cables to reboot the system and then perform registration by jumping pin 13 & 4. See if you can tape the gob by the ignition switch during that process. I DO NOT HAVE PROOF TO SHOW YOU ABOUT 1 HOUR BUT I USUALLY LEAVE IT LIKE THAT BETWEEN 45-60 MIN SO ITS ENOUGH TIME FOR THE RELAREN TO BE COMPLETED.

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Matt Owner
North Carolina
Matt
 

If you do a full system code scan can you ping all of the modules. If so does the Vin match in the pcm? If all that is good, time to get a diagram out and start checking cranking circuit and inputs.

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Sam Owner
Maryland
Sam
 

On my verdict it does not show vin, I did scan bcm and did not have any codes

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Timothy Owner/Technician
Wisconsin
Timothy
 

Should have theft codes if it's immo. No codes, and no theft light means that the Immo unit likes the keys. Jumping the terminals, in my experience works for late models after 2009, but it never hurts to try. Incidentally, I've done a bunch of relearns, and I've never had to leave the key on longer than thirty minutes. An hour is extreme, and unnecessary. AM ‘rebuilders’ are often charlatans…

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Matt Owner
North Carolina
Matt
 

I agree with Timothy. Not just the aftermarket guys either. Ive had 2 bad OEM modules out of the box this year as well.

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Sam Owner
Maryland
Sam
 

But when the old unit is reinstalled it still won’t crank, it was cranking before removing this unit though

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Timothy Owner/Technician
Wisconsin
Timothy
 

It's entirely possible, that your attempts at relearning the theft ‘got in the way’ of the old ECM as well. Now, neither ECM/PCM knows the theft… Since you don't see a lockout, it might be valuable to trace this as just a no-start, but I believe theft is still an issue…

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Sam Owner
Maryland
Sam
 

Thanks, this unit came from flagship, and I agree. O theft light or theft code so my assumption is immobilizer is operating correctly

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Allen Owner/Technician
Texas
Allen
 

Crash input?

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Sam Owner
Maryland
Sam
 

Crash inputs?

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Gera Technician
Arizona
Gera
 

if the handshake was successful there could a problem with the steering lock. Is the steering wheel locked? if the steering wheel is unlocked when you enter the car it will never attempt a start. you must first try and open and shut the door until the steering wheel locks. If the steering wheel is locked currently attempt to move the wheel back and forth off the lock some and see if the motor…

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Sam Owner
Maryland
Sam
 

Thank you, so when you will attempt to start the steering wheel comes out then right neck in real quick

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